Road surface treating machine



Dec. 6, 1938. F CARSWELL 2,138,904

ROAD SURFACE TREATING MACHINE' Filed Aug. 12, 1935 5 Sheets-Sheet 1ATTORNEYS,

De c 6, 1938. F. CARSWE LL 2,138,904

ROAD SURFACE TREATING MACHINE Filed Aug. 12, 1935 5 Sheets-Sheet 2INVENTOR, Zfiswk .Z. alu'wellwa M I ATTORNEYS.

1386- v 1938- F. 1.. CARSWELL 2,138,904.

ROAD SURFACE TREATING MACHINE Filed Aug. 12, 1935 3 Sheets-Sheet 3 1 NVE N TOR, W/a/z/zl. ('anszuell.

ATTORNEYS.

Patented Dec. 6, 1938 UNITED STATES PATENT OFFICE 14 Claims.

This invention relates to road surface treating machines of thecharacter especially adapted for preparing what is known in the art asan oil road, and one of the primary objects is the provision of such amachine comprising a combination of specifically formed parts whichpermits completely producing a finished road surface after one passageof the machine along the road.

A machine embodying this invention is of the general type of that shownand described in my copending application Serial Number 32,847, filedJuly24, 1935, for Road making machine, and the improvement over themachine shown in said co-pending application lies principally in theemployment of a series of plows disposed in a particular manner andinter-related so that the furrow formed in the roadbed by one plow isfilled by roadbed material lifted and deposited by the next succeedingplow, by one subsequent to the deposition of road making material in thesaid furrow immediately after it has been created.

A yet further object of this invention is the provision of an uniquemethod of treating the surfaces of roadways which comprises forminglongitudinally extending furrows, depositing road making material in thebottom of the furrow, filling the said furrow with road material as thenext succeeding furrow is formed, and then smoothing the surface of theroadway and, if desired, spraying thereover a layer of road oil orsimilar material immediately prior to finally tamping the roadway.

A large number of minor objects of this invention will appear during thecourse of the following specification, referring to the accompanyingdrawings, wherein one embodiment of the invention has been illustrated,and wherein:

Figure 1 is a side elevation of a road surface treating machine made inaccordance with this invention.

Fig. 2 is a top plan view of the same, with parts broken away forclearness.

Fig. 3 is a fragmentary, horizontal, sectional view taken along the lineIII-I11 of Fig. 1.

Fig. 4 is a fragmentary, detailed, side elevation of one of the plowsand the associated nozzle.

Fig. 5 is an end view of the same, and,

Fig. 6 is a top plan view of one of the plows of the machine.

In constructing the machine, a frame 8 is provided with means fordrawing the same along over the roadway and in most instances, thismeans will comprise wheels I0, disposed at the rear end of the machineand carried by an axle I2, and wheels I4 positioned at the forward endof the machine and having a hitch member I6 secured to the frameintermediate thereof whereby the machine may be fastened to a tractor orthe like for the purpose of drawing it along a roadway, the surface ofwhich is being treated.

The numeral I8 designates draw bars that are connected to the forwardend of frame 8 through a pivotal connection 20. The rear ends of thesedraw bars are secured to a transverse member 22 forming a part of thescarifying device which also includes a plurality of forwardly anddownwardly inclined teeth 24, each of which is adjustably secured tomember 22 in any suitable fashion. Draw bars I8 may be moved toward andfrom the roadway through the medium of a screw-threaded shaft 26, one ofwhich is associated with each draw bar I8 respectively through themedium of a link 28. A hand wheel 30 in screw-threaded engagement withshaft 26 may be manipulated to raise and lower the respective draw barand all parts associated therewith.

There are two gangs of discs 32 carried immediately behind scarifyingmembers 24, as illustrated in Fig. 2. 'These discs 32 are mounted uponshafts 34 that extend outwardly from and at an angle to the longitudinalaxis of frame 8 and each gang of discs 32 is connected to a draw bar I8by an arm 36 that is pivotally mounted to the draw bar I8 at its forwardend as at 38. Each gang of discs 32 is individually adjustable up anddown toward the roadway surface by a hand wheel 40 in screw-threadedengagement with shaft 42 which is connected at 44 directly to arm 36.

It has been found in handling some soils that it is desirable to firstplace a coating of oil upon the roadway prior to the next step in themethod which the machine performs. In such instances, a transverseheader 44, having apertures 46 formed along the bottom thereof, isdisposed immediately behind the two gangs of discs 32 and connected toreservoirs 48 in a manner which will hereinafter" be more fully setdown. 5

A frame 50 which forms a circumscribing body of substantially triangularnature is mounted upon frame 8 through the medium of a pair of draw bars52, the forward ends of which, are

secured to the frame as a whole adjacent front 50 wheels I4 thereof,while the rearwardly extending ends thereof are attached to frame 50along the rear side thereof. A hand wheel 54 carried by screw-threadedshaft 56 and linked to frame 50 as at 58, allows raising and lowering ofbeams 55 52 for the purpose of carrying frame 50 and all the partsbodily toward and from the roadway. This frame 50 may be tilted withrespect to the horizontal by a similar device comprising hand wheel 60,threaded shaft 62 and bearing 64. The latter interconnects beams 52 andframe 50 as illustrated. It is obvious that any means for raising andlowering or otherwise adjusting the parts may be employed other than themeans just described. It ,is common in this art to employ pneumatic orhydraulic adjusting mechanism and where the adjustment of theparts is tobe controlled from a central cab, such means should be provided.

The step in the method of treating the roadway surface which followsdiscing forms the important part of this invention and the machineillustrated embodies one exemplification of means for creatinglongitudinal furrows in the roadway and then filling the furrows in aspecial manner subsequent to depositing road making material in eachindividual furrow. Frame 50 carries a series of plows 66, one of whichisin the form of a double mold board plow 68, which is located at thelongitudinal center of the roadway. Plows 6B are arranged in pathsextending laterally from the longitudinal center of the roadway andthese paths intersect at plow 68. In one form, the plows are arranged inpaths which project outwardly and rearwardly of the roadway center andthe respective plows of each series is positioned so that one plow willlift and deposit material from the roadbed into the furrow formed by theplow just ahead. Such action takes place during the time the firstmentioned plow is forming a furrow in the roadbed.

These plows 66, as well as the central plow 68, are adjustably mountedupon frame 50 as shown in Fig. 5. In order to mount these plows 66 foradjustment, 2. boss 10 is formed integrally with frame 50 to receive thebeam 12 so that it can be engaged by bolt 14 for the purpose of holdingthe plow per se in the desired position with respect to the other plowsof the series and with respect to the normal surface of the roadway.

Each plow is provided with a nozzle 16, specially formed as illustratedin Figs. 4, 5 and 6 so that oil or other road making material may bespread along the entire width of the furrow formed by the associatedplow. Each nozzle 16 is connected to a manifold 18 by a branch pipe 80and this manifold in turn is joined to tanks 48 in a manner to behereinafter set down. It is obvious that the particular arrangement ofplows 66 and 68 might be reversed so that instead of throwing the earthinwardly, the plows may throw the earth outwardly and accomplish thesame end. Varying the height of the plows will permit altering thethickness of the surface material which overlies the layer of oil or thelike and through the arrangement of plows illustrated, it will be seenthat an unfilled furrow will be left along the outer edges of theroadway.

Smoothing scrapers-82, angled rearwardly and outwardly from thelongitudinal center of the roadway will draw earth to these unfilledfurrows and it is important that rear wheels Ill be arranged so thatthey will ride over the earth which is moved into the two outsidefurrows by scrapers 82. A manifold 84 positioned along behind scrapers82 may be attached to tanks 48 by branch pipe 86 and other means for thepurpose of laying on a final coating of road oil or the like.

As a final step in treating the surface of the road, a tamping drum 88is joined to beams 52 and frame 50 by links 90, all to the end that thesurface of the road is compacted by the plurality of membersv 92 thatform a part of drum 88.

It is possible to treat the road. surface with oil or material ofdifferent characteristics and the invention contemplates the use ofpumps 94 which draw oil from either one of tanks 48 and force it tonozzles 16, header 44, or manifold 84. Plow 68 has two of these nozzlesbecause of the width of the furrow which it forms and branch pipe 96,having a valve 98 therein, supplies oil to manifold 18 as desired.Branch pipe 88 is valved as at I00 to control the flow of oil tomanifold 84. Branch pipe I02 joins header 44 and a valve I04 interposedtherein allows the operator to control the flow of oil therethrough. Thepiping arrangement is such that oil from either tank 48 may be pumped toany one of the three zones mentioned, i. e., header 44, nozzles 16 andmanifold 84. The use of a double mold board plow 68 insures that themachine will follow a distinct straight line along the roadway and thedisposition of plows 66 to each side of the center equalizes the entiremachine.

Drawing the machine along the roadway once will create a finished oilroad and while a particular combination of parts and specific structuresof the said parts are set down, it is understood that many modificationsmight be made in the machine without departing from the spirit of theinvention and scope of the apps .ided claims.

Having thus described the invention, what is claimed as new and desiredto be secured by Letters Patent is:

l. A machine of the character described comprising a frame; a series ofplows mounted on the frame; and means adjacent each plow respectivelyfor depositing road making material along the bottom of the furrowformed by that plow, said plows being arranged in a path extendinglaterally and rearwardly from a point on the longitudinal center of themachine, whereby the road material moved by each plow is deposited inthe furrow made by the adjacent preceding plow.

2. A machine of the character described comprising a frame; a series offlat bottom plows mounted on the frame; and means adjacent each plowrespectively for depositing road making material along the bottom of thefurrow formed by that plow, said plows being arranged in convergingpaths meeting at the longitudinal center of the roadway, with theircutting edges in overlapped relation whereby the bottoms of the severalfurrows are in a continuous plane.

3. A machine of the character described comprising a frame; a series ofplows mounted on the frame; and means adjacent each plow respectivelyfor depositing road making material along the bottom of the furrowformed by that plow, said plows being arranged in a path extending at anangle across the longitudinal center of the roadway and in such fashionas to cause the roadbed material raised by any given plow to be invertedand deposited'in the furrow formed by the plow next ahead whereby theroad-making material in that furrow is covered by roadbed material,whereby a layer of road making material is completely covered by theroad bed material.

4. A machine of the character described comprising a frame; a series ofplows mounted on the frame in paths extending laterally at an angle tothe longitudinal center of the roadway and meeting at said centeradapted to move all of the material of said roadway; means adjacent eachplow for depositing road making material along the bottom of the furrowformed by that plow; and a double mold board plow at the meeting pointof said paths of plows for the purpose specified. a

5. A machine of the character described comprising a frame; a series ofplows mounted on the frame in paths extending laterally and rearwardlyat an angle to the longitudinal center of the roadway and meeting atsaid center; means adjacent each plow for depositing road makingmaterial along the bottom of the furrow formed by that plow; a doublemold board plow at the forward meeting point of said paths of plows forthe purpose specified; and a means adjacent each mold board of saiddouble mold board plow respectively for depositing road making materialalong the bottom of the furrow formed by that particular plow.

6. A machine of the character described comprising a frame; a series ofplows mounted'on the frame and positoned so that substantally all theroadbed materal from one plow is deposited in the furrow formed by theplow next adjacent thereto; means behind each plow respectively fordepositing road making material along the bottom of the furrow formed bythat plow prior to the deposition of the road bed material therein; andmeansfor setting said plows at different heights with respect to thenormal surface of the roadbed.

'7. A machine of the character described comprising a frame; a series ofplows mounted in V shaped formation on the frame and positioned so thatthe roadbed material from one plow is deposited in the furrow formed bythe plow next adjacent thereto; means behind each plow respectively fordepositing road making material along the bottom of the furrow formed bythat plow; means for raising and lowering all of said plows toward andfrom the roadbed; and means for individually setting said plows indifierent positions with respect to each other and with respect to thenormal surface of the roadbed.

8. A machine of the character described comprising a frame; a V shapedseries of plows mounted on the frame and positioned so that the roadbedmaterial from one plow is deposited in the furrow formed by the plownext adjacent thereto; means behind each plow respectively fordepositing road making material along the bottom of the furrow formed bythat plow; and means for depositing roadbed material in the furrowformed by the last plow of the series whereby to present a smoothsurface after one passage of the machine along the roadbed.

9. A machine of the character described comprising a frame; a series ofplows mounted on the frame and positioned so that substantially all theroadbed material from one plow is inverted and deposited in the furrowformed by the plow next adjacent thereto; means behind each plowrespectively for depositing road making material along the bottom of thefurrow formed by that plow;eand means for smoothing the surface of theroadbed material behind the series of plows.

10. A machine of the character described comprising a frame; a series ofplows mounted on the frame and positioned so that the roadbed materialfrom one plow is deposited in the furrow formed by the plow nextadjacent thereto; means behind each plow respectively for depositingroad making material on the entire bottom surface of the furrow formedby that plow; means for' smoothing the surface of the roadbed behind theseries of plows; and means for depositing a coating of road makingmaterial over the so smoothed roadbed.

11. A machine of the character described comprising a frame; meanscarried by the frame for scarifylng the roadbed to a predetermineddepth; a series of plows positioned in an inverted V shape to thedirection of travel to simultaneously create and fill furrows in thescarified roadbed; means ing material in said furrow at the bottomthereof; and subsequently covering said material with roadbed materiallifted from the roadbed along a strip of the roadbed immediatelyadjacent to the said furrow, whereby said road making material iscompletely covered.

13. The method of treating the surface of a roadway which comprisesforming a series of fiat bottom furrows longitudinally along the roadbedto produce a planar surface across said roadbed substantially parallelwith the surface thereof; depositing road making material in saidfurrows as they are being formed; and filling each of the furrowssubsequent to depositing the said road making material with the roadbedmaterial lifted from the roadbed during the formation of the adjacentfurrow.

14. The method of treating the surface of a roadway which comprisesforming a series of furrows of different depths longitudinally along theroadbed; depositing road making material entirely across the bottom ofeach of said furrows as they are formed; and filling each of the furrowssubsequent to depositing the said road making material with the roadbedmaterial lifted from the roadbed during the formation of the nextadjacent furrow, whereby a layer of road making material is entirelycovered by road material entirely across the roadway.

L. CARSWELL.

